Improvement in machines for rolling



- s. TRETHEWEY. Machine for Rolling and Straightening Metal Bar s.

No.199,482. Patentd Jan. 22,1878.

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SAMU1 *1 L TRETHEWEY, O-F'PITTSBURG, PENNSYLVANIAH IMPROVEMENT IN MACHINES FOR ROLLINGAND STRAIGHTENING METAL BARS.

Specification forming part-ofLetters Patent No.- 199,4S 2, dated J auuary 2Q, 1878 application filed. r October 26, 1877. I 1 a To all whom it may concern:

Be it known that I, SAMUEL TRETHEWEY,

of Pittsburg, inthe'county of Allegheny and State of Pennsylvania, have-invented a new .position of the guides and eccentric journalboxes of the rolls. Fig. 4 is an end elevation of the machine, showing the manner of con; trollingthe rolls by the eccentric journal-boxes. Fig. 5 is a detached view of one of the eccentrio journahboxes. Fig. 6 is a detached view of the guides, and Fig. 7 is a diagram of conerolls used for rolling tapers.

Like letters refer to like parts wherever they occur.

My invention relates generally to the operati on and construction of metal-workin g machinery, and is especially directed to mechanism for rolling, straightening, polishing, and otherwise working round and taper bars.

I will now proceed to describe my invention, so that others skilled in the art to which it appertains may apply the same.

A represents a suitable bed, upon which are erected fixed housings B B for the support of rotary housing 0. G indicates a rotary housing, provided with journals 0 c, resting in the fixed housings B B. The rotary housing is generally composed of two or more sections, chambered out or formed hollow for the reception of two or more work-rolls, d d, the sections being clamped and held together by bolts l c c, or in other suitable manner. In the journals of the rotary housings are formed bearings for the work-rolls d d, said bearings being bushed with journal-boxes e, within which the journal of the roll is received. In order to adjust the rolls toor from each other, the bearing of the roll (I. in box 6 is made eccentric with the bearing of box 0 in the rotary housing, so that by turning the boxes to bring the points of greatest eccentricity to or fromthe axis of the rotary housing the rolls d (1 may be caused to approach or recede from each other. Keyed to the outer ends of bushings or-boxese are. segments or quadrants f, havingcurved-slots for thepassage of bolts 0 c, which clamp the sections of the rotary housings. These quadrants are used to turn the boxes to adjust the, rolls, and serve to secure the boxes when the rolls are adjusted. They may be marked with.

a scale to guide the operator, and are clamped by the tie-bolts c c, for which latter purpose, if desired, set-screws-may be substituted.

d (1 indicate work-rolls so arranged and journaled in the rotary housings that their axes cross each other slightly, in order to get a spiral motion on the bar when rounds are to be rolled. One end of each work-roll projects beyond the journal of the rotary housing 0, and is provided with a gear wheel or pinion, d, which engages with a fixed internal gear, g, secured in a housing on bed A. h h indicate the guide, which consists of a tube or tubes slotted longitudinally upon opposite sides to correspond to the adjacent surfaces of workrolls d d. This guide occupies the axis of the rotary housing 0, and is introduced at one or both ends of the machine, accordingly as it is formed in one or more sections.

The rolls (1 01 thus far described are plain, and their arrangement with crossing axes such as is adapted to feed a bar through the machine; but for rolling and straightening tapers the rolls employed should be conical, as shown in Fig. 8; or plain rolls should be arranged to give the same effect, the axes in the first instance,-Fig. 8, being parallel, while in the latterthey would, if extended, cross in the same plane.

The rolls, as rolls, form no part of the invention, and will be changed and adapted to either roll, roll and straighten, polish, or grind, as circumstances may require, being for said purposes arranged and combined according to principles well known in the art.

The power is applied to the rotary housing either by a belt, which I deem preferable, or by cog-gearing, if desired, all of which will readily suggest itself to the skilled mechanic.

The operation of my devices, when furnished with plain rolls, arranged as shown in Fig. 2,

is asfollows: The eccentric bushings or-boxes .having been turned by means of the quadrants to adjust the rolls to the size of bar to be rolled, and secured in position, as before speci- .fied, a suitable-sized guide, h h, is inserted in are journaled in rotary housings they revolve arou ld the bar, Which forms the axis of motion, so that if the machinery is true and properly 'adjustedthe rod must be delivered perfectly rounded and straightened, because the axis of the bar and axis of rotation of the machinery coincide.

When the plain rolls are arranged for the purpose, or conical rolls are employed, to roll and true tapering rods, it will, of course, be impossible to pass the bar through the machine. In' such case the bar is fed in and withdrawn from the same end, a single isection-guide being used. In all other respects the machinery employed is identical.

The advantages of myinvention are that the bar can be worked at less speed, and is, therefore, not aflected by centrifugal force. The machine requires less power, and is readily operated by unskilled labor.

Having thus described my invention, what Iclaim, and desire to secure by Letters Patent, is- I 1. The combination, in a metal-working machine, of fixed housings, a rotary housing, work-rolls jonrnaled in the rotary housing and provided with pinions, and an independent internal gear for actuating the work-rolls, substantially as and for the purpose specified.

2. The combination, with the rotary housings and work-rolls journaled therein, of the axially-arranged guide or guides, substantially as and for the purpose specified;

- In'testimonywhereof I, the said SAMUEL TRETHEWEY, have hereunto set my hand.

SAMUEL TRETHEWEY.

I Witnesses: 7

JAMES I. KAY, F. W. BITTER, Jr. 

